Video Transcript
Which of the following is not a
method of removing water from the body? (A) Shedding skin, (B) sweating,
(C) urinating, or (D) exhaling.
This question is asking us to
select the response that is not a method of removing water from the body. So we can expect that three of the
choices will be methods of removing water. And we’re looking for the one that
is not. So we’ll start by identifying what
is being removed by each of these methods described. And at the end, we’ll select the
answer choice that does not remove any water.
Shedding skin is what happens to
the outer layer of our skin cells at the end of their life cycle. These cells can be rubbed off by
clothing and furniture, washed off when we bathe, or simply fall off without us
noticing. Sweating is an excretory process
carried out by the sweat glands in our skin. Our sweat consists mostly of water,
but it also contains urea, salts, and many other chemicals. Urinating is the process of
releasing urine from the bladder. Urine is filtered from the blood by
the kidneys. It’s mostly water, and it contains
urea, salts, and other soluble wastes produced by our body. Exhaling is how our lungs remove
gaseous wastes from our bodies. We mostly exhale carbon dioxide,
but some water also evaporates from the moist surfaces within our lungs. So sweating, urinating, and
exhaling are all different methods of removing water from the body, but shedding
skin is not.
